Intangible [ One Piece]

Ultimately this is a Marco X OC fanfic, but there will be some Ace fluff as well ^-^
A few notes:
The story is going to begin five years before Luffy actually sets sail (2 years before Ace sets sail).
Also, I perceived Marco's devil fruit ability and the whole 'Phoenix' persona as that he is essentially ageless (as in he no longer ages because his power is constantly regenerating)
Depending on where I go with this story, it may end up being more 'adultish' and I may have to up the rating later on, but that's still being debated.
Also I feel like I shouldn't have to mention this, but I will anyway..... I DO NOT OWN ONE PIECE!!!! (I hope that's obvious)
...meh I can't think of anything else I want to add....